Upright seat



FIG. 1 is a front perspective view of the upright seat showing the new design in a retracted condition;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof; the right view being a mirror image thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof; the components of the seat in broken lines forming no part of the claimed invention. 

CLAIM The ornamental design for a upright seat, as shown and described. 